21030213001051 has 8 divisors (see below), whose sum is σ = 22273889957424. Its totient is φ = 19787270000640.

The previous prime is 21030213001013. The next prime is 21030213001139. The reversal of 21030213001051 is 15010031203012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21030213001051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21030213001351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183429990 + ... + 183544603.

It is an arithmetic number, because the mean of its divisors is an integer number (2784236244678).

Almost surely, 2^{21030213001051} is an apocalyptic number.

21030213001051 is a deficient number, since it is larger than the sum of its proper divisors (1243676956373).

21030213001051 is a wasteful number, since it uses less digits than its factorization.

21030213001051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366977981.

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 21030213001051 its reverse (15010031203012), we get a palindrome (36040244204063).

The spelling of 21030213001051 in words is "twenty-one trillion, thirty billion, two hundred thirteen million, one thousand, fifty-one".